Zhang Yulin, Wang Shiyu, Tian Yi, Chen Long, Du Yuhan, Su Gehong, Hu Yu
School of New Energy Materials and Chemistry, Leshan Normal University, Leshan 614000, China.
Leshan West Silicon Materials Photovoltaic and New Energy Industry Technology Research Institute, Leshan 614000, China.
Polymers (Basel). 2023 Sep 13;15(18):3748. doi: 10.3390/polym15183748.
Excellent mechanical properties and self-healing properties are very important for the practical application of hydrogel flexible sensors. In this study, acrylic acid and stearyl methyl acrylate were selected as monomers to synthesize hydrophobic association hydrogels, and multi-physically cross-linked hydrogels were synthesized by adding ferric chloride and polyvinyl alcohol to introduce ion interaction and a hydrogen bond cross-linking network. The hydrogels were characterized by FTIR, XRD and SEM, and the mechanical properties and self-healing properties were tested using a universal testing machine. It was confirmed that the strength of the hydrogel was significantly improved with the addition of ferric chloride and polyvinyl alcohol, and the hydrogel still showed good self-healing properties. Further testing of its application as a conductive sensor has demonstrated sensitive and stable motion sensing capabilities. This provides an important reference for high-performance hydrogel sensors with both high strength and self-healing properties.
优异的机械性能和自愈合性能对于水凝胶柔性传感器的实际应用非常重要。在本研究中，选择丙烯酸和甲基丙烯酸十八酯作为单体来合成疏水缔合水凝胶，并通过添加氯化铁和聚乙烯醇引入离子相互作用和氢键交联网络来合成多物理交联水凝胶。通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）和扫描电子显微镜（SEM）对水凝胶进行了表征，并使用万能试验机测试了其机械性能和自愈合性能。结果证实，添加氯化铁和聚乙烯醇后水凝胶的强度显著提高，并且该水凝胶仍表现出良好的自愈合性能。对其作为导电传感器的应用进行的进一步测试表明了其具有灵敏且稳定的运动传感能力。这为具有高强度和自愈合性能的高性能水凝胶传感器提供了重要参考。
